diff options
| author | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2014-10-03 20:57:30 -0400 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2014-10-03 20:57:30 -0400 |
| commit | cef3566998fcae6936d781e678c309950a8a5787 (patch) | |
| tree | 7aeed19f50fd9a5eeabc9e80e12b3105f0548a04 /src | |
| parent | f88dc3edeb9c49622fcc773cb6153238fe9efbe2 (diff) | |
sd-id128: do stricter checking of random boot id
If we are bothering to check whether the kernel is not feeding us
bad data, we might as well do it properly.
CID #1237692.
Diffstat (limited to 'src')
| -rw-r--r-- | src/libsystemd/sd-id128/sd-id128.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/libsystemd/sd-id128/sd-id128.c b/src/libsystemd/sd-id128/sd-id128.c index a1e44e6d19..233ffa070b 100644 --- a/src/libsystemd/sd-id128/sd-id128.c +++ b/src/libsystemd/sd-id128/sd-id128.c @@ -183,11 +183,14 @@ _public_ int sd_id128_get_boot(sd_id128_t *ret) { for (j = 0, p = buf; j < 16; j++) { int a, b; - if (p >= buf + k) + if (p >= buf + k - 1) return -EIO; - if (*p == '-') + if (*p == '-') { p++; + if (p >= buf + k - 1) + return -EIO; + } a = unhexchar(p[0]); b = unhexchar(p[1]); |